Sexual selection has often been dichotomized into intersexual and intrasexual components of selection, favoring ornaments and weapons, respectively. Here, we show that a weapon used in male-male combat is sometimes also used in a functionally similar . . .

Acoustic mating signals are often important as both interspecific prezygotic isolating mechanisms and as sexually selected traits in intraspecific mate choice. Here, we investigate the potential for cricket courtship song to act as an isolating mechan . . .

Sexual selection has often been dichotomized into intersexual and intrasexual components of selection, favoring ornaments and weapons, respectively. Here, we show that a weapon used in male-male combat is sometimes also used in a functionally similar . . .

Group dynamics and aggressive behavior of guanaco (Lama guanicoe) male groups (MGs) were described and quantified. All?male groups consisted of yearling, subadult, and adult males. Yearlings joined MGs from early Sep. to Feb., but the majority entered . . .

While studies of mate choice based on male color pattern are ubiquitous, studies of mate choice based on ornamental color traits in sexually monomorphic species are less common. We conducted manipulative field experiments on two color ornaments of kin . . .